Head-lamp.



H. M. HA'YS l W. R. RosBNBAUM.

HEADLAMP.

APPLIOATION FILED MAY 5, 1911.

Patented Mar. 12, 1912.'

this recess is convex, being substantially concentric with the center ofthe ball-andsocket joint. Accordingly, the lamp-socket' the projection22 and the screw 25 constitut-' ing,l pivots for this purpose. Asrotation of the lamp-socket about its longitudinal axis is unnecessaryand undesirable, the recess in the screw 26 is made narrow in onedirection, while elongated in the direction of the longitudinal axis ofthe lamp-socket.

The connections just described, between the lamp-socket andthe-battery-case, consti'- tute electrical as well as mechanicalconnections. rlhe screw 26, as shown in Fig. 1,`is insulated from thehead 21, and its shank is engaged by a second screw 27 also insulatedfrom the lamp-socket. The latter screw constitutes a contact-deviceengaged .by the insulated contact 15 of the electric lamp, while thelamp-socket constitutes the other connection, in the usual manner. Thebattery 5 is provided with the usual springterminals and 34, of whichthe latter engages the inner surface of the battery-case. The current isthus conducted from the battery through the lamp-casing and theprojection 22 to the lampesocket, and thus to the base of the lamp. Thecurrent returns from the lamp through the terminal l5 and the screws27'and 26 to the screw 25 and the arm 24. Between 'the latter part,however, and the other battery-terminal '33 a switch is interposed, bywhich the current may be turned on or off from the lamp. For thispurpose 'the arm 2l is formed on the end of a. conducting-strip which isinsulated from the bar 23, but is fixed thereto bj' screv. i. 28. Theouter end 29 of the conducting-strip is bent upwardly at the end of thecasing, and

a switch-arm 80 is pivoted thereon by means of a screw 3l. rl."hisswitch-arm coperates with a fixed contact-stud 32, which is engaged bythe battery-contact 33, thus completing the circuit.. To disconnect thelamp from the battery theswitch-arm is swung aside out of engagementwith 'the contactstud 32, so as to rest against the insulatingplate ll.This switch is so located that it may be conveniently operated while thelamp is in position on the head.

To prevent accidental Contact and a resulting short-circuit between thelamp- 1 socket andthe arm 24' when the socket is swung to an extremeposition, a Ushape`d guard 35 is xed on the bar 23 and depends at eachside of the arm.

For most purposes the lamp is employed as shown in Fig. 3, thebattery-case being supported upon 'the forehead with the headpiece 6restingr flat against the face, and thus supporting,r the battery firmlyand without discomfort to the user. In this position of the device thelamp may be adjusted to l project its rays forward from aY pointbetween, and substantially on the level of, the eyes, so that the waysapproximate as nearly as possible to the line of sight. ingly, the lampmay be used to great ad vantage in inspecting deep cavities, such thethroat, or the aural or nasal passages.

The lamp may also be employed, in opti cal work, by mounting it upon thehead oi' the patient, with the battery-box at one side of the head,andthe electric lamp swung into' the position of Fig. l. ln this mannerthe head-lamp may be employed to project Yits rays against the mirror ofan ophthalrnoscope upon the head of the oculist, and

thence intp the patients eyes in the usual.

manner.

When the lamp is not in use it is adapted to be folded into a very smallcompass. .fit

.and illustrated in the accompanying drawings, but may be embodied invarious forms within the nature of the invention, as it is defined inthe following claims. A

lVe claim e l. A headlamp having, in combination, a battery-caseprovided with a head-piece adapted to rest against and conforming to theusers head, means for securing the battery-case in place on the head,and an elec- ,tric lamp carried by the battery-case and connectedtherewith by 'a universal joint comprising both mechanical andelectrical connections, whereby the lamp may be moved to vary thedirection in which the light is projected.

2. A head-lamp having, in combinatioma fiat battery-case provided with aconcave head-piece adapted to rest against and conform to the usershead, means for securing the battery-case upon the forehead, and anelectric lamp provided with a condensinglens and carried by thebattery-case, the lamp being connected with the bottom of the case by ajoint comprising both mechanical and electrical connections, so as todepend therefrom into a position between the eyes of the user, and beingmovable into position to direct the light in the line of vision.

3. A head-lamp having. in combination.y a liat, elongated battery-ease,means for securing the battery-case upon the forehead of the user, andan electric lamp carried by the battery-case and connected therewith,substantially the middle of the lower edge of the case, by means of ajoint adapted to permit the lamp to be swung either into the AccordI4q.:

plane of the battery-case or into a position normal to. said'plane. A 4.A head-lamp having, in combination, a-

batt'cry-casq means for securing the battery-cas'e upon the h'ead of theuser, anelectnx-1c lam carried by`A the battery-case and `connectetherewith, at sul'istantially the middle ofthe case, by a universaljoint comprising both mechanical'and electrical connections between thecase and the lamp, and a switch at one end of the battery-case connectedin series with the lamp through said joint. t

5. head-lamp having, in combination, a battery-case, an electric lamp,and a universal -jornt connecting the battery-case andthe 1 lamp andcomprisingr cooperatingr ball-audsocket members, one of said membersbeing connected with the battery -case and the other with the lamp, andthe latter member beingr provided with a recessed surface substantiallyconcentric with the ball-and-socket joint, and a resilient meml r fixedto the battery-case and engaging said surface so as to holdtheball-and-socket members resiliently in engagement while permittingrelative movements thereof to adjust the position of the lamp.

6. A. head-lamp having, in combination, an electric-lamp, a lamp-socket,in winch the lamp is mounted, proyl'ded with a head haw.

ing a rounded recess, a battery-case having a rounded'` projection'engaging said recess, ia

contact-member mounted upon, but-insulated from, said head andelectrically connected :with a terminal of the lamp, said contact-'memberbeing provided wlth a surface ysubstantially concentric with saidrecess and projection, and a resilient member mounted on thebattery-case and yieldingly engaging said surface so as to makeelectrical connection therewith and also maintain the yrecess yandprojection in engagement, the projection and theresilient member beinginsulated from each other, and a battery in the battery-case of whichthe terminals are electrically connected-with the projection and theresilient member, respectively.

7. A head-lamp having, 'in combination,

an electric lamjna lamp-socket in which the ease and connected,throughthe beforementioned parts, with the electric lamp. HAROLD M.HAYS.

` WILLTAM R. ROSENABAUM; i.

` Witnesses for Harold M. Hays:- JAarEs R. VALENTINE, THos.l TIGHE.

. Witnesses for William R. Rosenbaum:

D. GURNEE, FARNUM F. DonsnY.

